Which of the following techniques is used by researchers to carry out dna replication in vitro? a. northern blotting b. dna fingerprinting c. polymerase chain reaction

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.